“[Voters] are afraid that the principals by which we elected a new speaker, a new majority leader and a new House, that we’ve some how lost our way,” Huelskamp said at a news conference.

Joining Huelskamp were Brent Bozell, chairman of the conservative group For America; Michael Needham, chairman of Heritage Action, the political action spinoff of the Heritage Foundation; and the Club for Growth’s Andrew Roth.

Huelskamp has been one of the most vocal members of the freshmen tea party wave elected in 2010, publicly clashing with Republican leadership and criticizing the process being used to negotiate a deal on the fiscal cliff. He was one of three House Republicans whom Boehner’s leadership teams booted recently from committee assignments. They said it was payback for their conservative voting records; those behind the moves countered that the trio acted like jerks, gratuitously criticizing GOP leaders.

The “Plan B” is expected to come for a vote on the House floor Thursday and Huelskamp wouldn’t venture a guess about whether conservatives have the votes to block it.

“I don’t know. I don’t do the counting,” he said.

A spokeswoman for House Majority Whip Kevin McCarthy watched the press conference from the edge of the circle of reporters and was on hand to respond when the press conference was over, reiterating that the bill come to a vote on Thursday.

Huelskamp added that he is not moving away from his opposition despite Americans for Tax Reform’s Grover Norquist saying that Republicans who vote for the proposal wouldn’t violate their oath not to raise taxes.

“I will admit that Grover is a friend of mine,” Huelskamp said. “I honestly believe that I made this pledge to 700,000 Kansans, not to Grover Norquist. I told them I would do anything and all I could to make sure Washington didn’t take more of your money.

“Now we can all argue about strategy and I understand that, but at the end of the day, our leadership has proposed a trillion-dollar revenue increase over the next 10 years, and I think that’s overwhelmingly opposed by most Republicans.”

The conservative leaders on hand for the press conference also warned that voting for the plan could result in them backing primary challengers in the next election.

Bozell, who has warned before that he would back primary challengers, reaffirmed that position. Roth said Club for Growth couldn’t say definitively that a vote for “plan B” would necessarily result in them backing a primary challenger.

“This is not a particular incident where we can say yes or no,” Roth said. ‘Whenever we get into a primary, whether we aim to defeat an incumbent or support a challenger we take their voting into factor, it’s a large factor… This is the sort of vote that we’ll look at closely when we look at our options in 2014.”